I agree the statement "DMARC passes if SPF (inclusive or) DKIM passes"
I was only trying to point out that "and/or" is ambiguous (which we agree, and Wikipedia even agrees - 2 paragraphs for a defintion, 5 paragraphs of criticism) and one of those ambiguities is thinking it means logical AND - which is something DMARC does not do.
Using just "or" would have been fine and conveyed the same meaning as it does now.